gh-77630: Change Charset to charset (GH-92439)

Doc/library/email.charset.rst

@@ -58,9 +58,9 @@ Import this class from the :mod:`email.charset` module.
    .. attribute:: header_encoding
 
       If the character set must be encoded before it can be used in an email
-      header, this attribute will be set to ``Charset.QP`` (for
-      quoted-printable), ``Charset.BASE64`` (for base64 encoding), or
-      ``Charset.SHORTEST`` for the shortest of QP or BASE64 encoding. Otherwise,
+      header, this attribute will be set to ``charset.QP`` (for
+      quoted-printable), ``charset.BASE64`` (for base64 encoding), or
+      ``charset.SHORTEST`` for the shortest of QP or BASE64 encoding. Otherwise,
       it will be ``None``.
 
 
@@ -68,7 +68,7 @@ Import this class from the :mod:`email.charset` module.
 
       Same as *header_encoding*, but describes the encoding for the mail
       message's body, which indeed may be different than the header encoding.
-      ``Charset.SHORTEST`` is not allowed for *body_encoding*.
+      ``charset.SHORTEST`` is not allowed for *body_encoding*.
 
 
    .. attribute:: output_charset
@@ -175,9 +175,9 @@ new entries to the global character set, alias, and codec registries:
    *charset* is the input character set, and must be the canonical name of a
    character set.
 
-   Optional *header_enc* and *body_enc* is either ``Charset.QP`` for
-   quoted-printable, ``Charset.BASE64`` for base64 encoding,
-   ``Charset.SHORTEST`` for the shortest of quoted-printable or base64 encoding,
+   Optional *header_enc* and *body_enc* is either ``charset.QP`` for
+   quoted-printable, ``charset.BASE64`` for base64 encoding,
+   ``charset.SHORTEST`` for the shortest of quoted-printable or base64 encoding,
    or ``None`` for no encoding.  ``SHORTEST`` is only valid for
    *header_enc*. The default is ``None`` for no encoding.
 

Lib/email/charset.py

@@ -112,8 +112,8 @@ def add_charset(charset, header_enc=None, body_enc=None, output_charset=None):
     charset is the input character set, and must be the canonical name of a
     character set.
 
-    Optional header_enc and body_enc is either Charset.QP for
-    quoted-printable, Charset.BASE64 for base64 encoding, Charset.SHORTEST for
+    Optional header_enc and body_enc is either charset.QP for
+    quoted-printable, charset.BASE64 for base64 encoding, charset.SHORTEST for
     the shortest of qp or base64 encoding, or None for no encoding.  SHORTEST
     is only valid for header_enc.  It describes how message headers and
     message bodies in the input charset are to be encoded.  Default is no
@@ -185,13 +185,13 @@ class Charset:
 
     header_encoding: If the character set must be encoded before it can be
                      used in an email header, this attribute will be set to
-                     Charset.QP (for quoted-printable), Charset.BASE64 (for
-                     base64 encoding), or Charset.SHORTEST for the shortest of
+                     charset.QP (for quoted-printable), charset.BASE64 (for
+                     base64 encoding), or charset.SHORTEST for the shortest of
                      QP or BASE64 encoding.  Otherwise, it will be None.
 
     body_encoding: Same as header_encoding, but describes the encoding for the
                    mail message's body, which indeed may be different than the
-                   header encoding.  Charset.SHORTEST is not allowed for
+                   header encoding.  charset.SHORTEST is not allowed for
                    body_encoding.
 
     output_charset: Some character sets must be converted before they can be